Web printing rotary press



June 21, 1932' H. M. BARBER WEB PRINTING ROTARY PRESS Filed Jun' 10. 1931 ATTGRN Patented June 21, 1932 UNITED STATES PATENT OFFICE HOWARD H. BARBER, OF PAWCATUCK, CONNECTICUT, ABSIGNOR T 0. B. OOTTBELL k sons COMPANY, 01? w'EsTEB-LY,

RHODE ISLAND, A CORPORATION 01' DELAWARE was ram'rnvo ROTARY amass Application filed June 10,

My invention generally comprises alternately acting web advancing means operable to pass the web through the printing couple at the surface speed thereof during the printings and at the same or. lesser speeds between the printings, according to the required spacin between the impressions.

y invention more'particularly comprises alternately acting web advancing units located respectively on the delivery and feedingin sides of the printing couple for controlling the passage of the web therethrough; the web advancing unit on the delivery side of the printing couple bein driven by the printing couple at the sur ace speed thereof and the web advancing unit on the feedingin side of the printing couple having avariable speed drive therefor to ermit said unit to be driven at the same sur ace speed as the printing couple or at lesser speeds.

My invention also includes a change gear drive for the web supply and take-up units, the web supply units serving to drive the web advancing unit on the feeding-in side of the printing couple through the above mentioned variable speed drive. a

A practical embodiment of my invention is represented in the accompanying drawing, in which:

Fig. 1 represents a diagrammatic side elevation of so much of a web printing rotary press as will give a clear understanding of my invention; the parts being shown in the positions they assume just before the web advancing unit on the feeding-in side of the printing couple releases control' of the web and just before the web advancing unit on the delivery side of the printing couple takes control of the web to pass it through the 1931. Serial No. 543,288.

view of the variable speed drive for; the web advancing unit on the feeding-in side of the printing couple.

The form and impression cylinders of the web printing couple are denoted by 1 and 2 respectively, the form cylinder in this instance being shown as twice the diameter of theimpression cylinder and as having a circumference equal to the combined maximum length of form and spacing of which the press is capable so that it makes one revolution for each impression and spacing.

A suitable inking mechanism 3 is ed for the form 4 on the cylinder 1.

The form and impression cylinders may be driven at a constant speed from the main drivt:1 shaft 5 through the train of gears 6,

provid- The web is denoted by 9, its supply roll by 10 and its re-wound roll by 11. The web supply unit is shown as comprising the Web feeding rolls 12, 13 and 14. The web take-up or re-winding unit is shown as comprising the rolls 15, 16 and 1.7. These two units are driven at selected speeds, according to the form spacings, from the gear 18 on the main I drive shaft 5 through the change gear 19 and the gears 20, 21 and 22; the roll 13 of the web supply unit being driven from the gear22 through the gear 23, shaft 24 and gears 25, 26, while the roll 17 of the webtake-up unit is driven from the 27, shaft 28 and gears 29, 30.

Alternately are provided on the opposite sides of the printing couple. The web advancing unit on the ceding-in side of the printing couple comprises a web feed roll 31 and its coacting drop roll 32.. The roll 31 is driven at the required speed to control the spacing lengths,

from the web supply unit, through a variable speed drive either at the surface speed of acting web advancing units gear 22 through the gear 1 the rinting couple or at predetermined lesser ressions.

well known Reeves of the roll 31 is driven by a belt 37 from the pulley 38 of the said variable speed dr ve. The drop roll 32 is brought into coactlon with its web feed roll 31 at the proper time vided with a, rod 41 which carries a stud or roller 42 traveling in a box cam 43 on a cam shaft 44, which shaft is driven from the shaft of the lmpression cylinder 2, through the gears 45, 46.

The web advancing unit on the deliver sideof the printing couple corn rises a we feed roll 47 and its coacting rop roll 48. The web feed roll 47 is driven at all times at the surface speed of the printing couple from the impression cylinder gear 7, through the gears 49, 50.

- The drop roll 48 is brought into coaction with its web feed roll 47 atthe proper times to pass the web through the printing couple at the surface s ed thereof during the printing periods. 11 the present instance this drop roll 48 is mounted on one arm 51 of a bell crank lever, the other arm 52 of which.

is provided with a rod 53 which carries a stud or roller 54 traveling in a box cam 55 on the cam shaft 44. A tension device 56 of any well known or approved form is provided for the web as it passes to the re-winding roll.

It is to be understood that the web travels at the same surface speed as the form and impression cylinders during the printings whether the spacings be longer or shorter and also that when the maximum spacings are being used the web also travels at the same surface speed as the form and impression cylinders at all times. However, when shorter .spacmgsbetween the impressions on the web are required the relative speeds of the rolls in the web supply unit and the rolls in the web advancing unit at the feeding-in side of the printing couple are such as to cause the web to accumulate between the said units when the rolls 31 and 32have control of the web, in an amount sufficient to permit the s d of the web to be accelerated by the coaction of the rolls 47 and 48 and passed through the rinting couple at the surface speed thereof uring the printings. L

The drop rolls 32 and 48 of the two web advancing units are alternately lifted by their respective cams 43 and 55 so that the rolls 31 and 32 of the web advancing unit on the feeding-in side of the printing couple are caused to release the web as the rolls 47 and 48 of the web advancing unit on the delivery side of the printing couple take control thereof, and vice versa.

From the above description it will be seen that the web advancing rolls 31 and 32 are caused to travel at a predetermined surface speed which is slower than that of the rolls 12,

13 and 14 on all except the maximum spacings for which the press is designed. Therefore,

the means for controlling the passage of the web through the printing couple causes the web to travel with the form and impression cglinders during the successive printings of t e web at the same speed where the maximum spacings are required. Where lesser spacings are required the speed of the web is retarded between the printings, the surface speed of the web advancing rolls 31 and 32 being adjusted b the variable speed drive to suit the require lesser spacing len hs bespeed which will ensure a perfectly wound roll when the web is placed under the proper tension by the tension device 56.

It is evident that various changes ma be resorted to in the construction, form an arrangement of the several parts without departing from the spirit and scope of my invention, and hence I do not intend to be limited to the particular embodiment herein 'shown and described, but i What I claim is 1. In a web printing rotary press, a printing couple driven at a constant speed, and alternately acting web advancing units for passing the web through the printing couple ings and at the same or lesser speeds between the printings, according to the required spacings between the impressions.

2. In a web printing rotary press, a printing cou is driven at a constant speed, the

at the surface speed thereof during the printternately acting cam controlled web advanc in units for passing the web through the printing couple at the surface speed thereof during the printings and at the same or lesser speeds between the printings, according to the required spacings between the impressons.

4. In a web printing rotary press, a rinting couple driven at a constant spee the web through the form cylinder having a circumference equal to the combined maximum length of form and spacing, and alternately acting cam controlled web advancing units for passing the printing couple at the surface speed thereo during the printings and at the same or lesser speeds between the printings, according to the required spacings between the impressions.

5. In a web printing rotary press a printing couple driven at a constant spee and al- ,ternately actin web advancing units located on opposite si es of the printing couple for passing the web therethrough at the surface speed thereof during the printings and at the same or lesser speeds between the printings, according to the required spacings between the impressions.

6. In a web printing rotary press, a printing couple driven at a constant speed, the form cylinder having a circumference equal to the combined maximum length of form and spacing, and alternately acting web advancing units located on opposite sides of the printing couple for passing the web therethrough at the surface speed thereof during the printings and at the between the printings, quired spacings between the impressions.

In a web printingrotary press, a print ing couple driven at a constant speed, and alternately acting cam controlled web advancing units located on opposite sides of the printing couple for passing the web therethrough at the surface speed thereof during the printings and at the same or lesser speeds between the printings, according to the required spacings between the impressions.

8. In a web printing rotary press, a printing couple driven at a constant speed, the form cylinder having a circumference equal to the combined maximum length of form and spacing, and alternately actmg cam controlled web advancing units located on opposite sides of the printing couple for passin the web therethrough at the surface spec thereof during the printings and at the same or lesser speeds beween the printings, according to the required spacings between the impressions.

9. In a web printing rotary press, a printing couple driven at a constant speed, a web advancing unit at the discharge side of the couple for passing the web therethrough at the surface speed thereof during the printin s, a web advancing unit at the feeding-in side of the couple for passing the web thereaccording to the rethrough at the same or lesser speeds between the printings, according to the required spacings between the impressions, and means for rendering said web advancing units alternately inoperative.

10. In a web printing rotary press, a printing couple driven at a constant speed, the form cylinder having a circumference equal same or lesser speeds passing the web therethrough at the same or esser speeds between the printings, according to the required spacings betweenthe 1m fressions, and means for rendering said we advancing units alternately inoperative,

11. In a web, printing rotary press, a printing couple driven at a constant speed, a web. advancing unit driven by the couple for pass-i ing .the web therethrough at the surface speed thereof during the printings, another web advancing unit for passing the .web through the couple at the same or lesser speeds between the printings, I quired spacings between the,impre s'sions,-.-a variablespeed drive for the; second 1 named web advancing unit, and meansrdr'ca sing said web advancing units to act alternately on the web. i

v 12. In a web printing rotary press, a rim:- ing couple driven at a constant spee the form cylinder having a circumference equal to the combined maximum length of form and spacing, a web advancing unit driven bv the couple for passing the web therethrough at the surface speed thereof during'the printings, another web advancing unit for passaccordinggtp the re r ing the web through the couple at the same or lesser speeds between the printings, ac? cording to the required'spacings between the impressions, a variable speed drive for the second named web advancing unit, and means for causing said web advancing units to act alternately on the web;

13. In a web printing rotary press, a printing couple driven at a constant speed, web supply and take-up units, means for driving them at predetermined speeds, a web advancing unit driven at the surface speed of the printing couple for passing the web therethrough during the printings, a second web advancing unit for passing the web through the printing couple between the printings, and a variable speed unit driven by the web supply unit for driving the second web advancing unit speed as or at lesser surface speeds than the printing couple, according to the requiredi spacings between the impressions.

14. In a web printing rotary press, a printing couple driven at a constant speed, the form cylinder of the printing couple having a circumference equal to the combined maximum length of form and spacing, web v at the same surface 4 eeann the printin couple betweenthe printings, and a varia 1e speed unit driven b the web supply unit for driving the secon web advancing unit at the same surface speed,as 6 or at lesser surface speeds than the printing couple, according to the required spacings between the impressions.

15. In a web printing rotary press, a rinting couple driven at a constant spee web in supply and take-up units, means including a change gear for rivin them at predetermine speeds, a web a vancing unit driven at the surface speed of the printing couple for passing the web therethrough during the 16 printings, a second web advancing unit for assing the web through the printin couple tween the printings, and a variab e s ed unit driven by the web supply unit for riving the. second web advancin unit at the 20 same surface speed as or at esse r surface speeds than the printin couple, according to the required spacings tween the impressions.

16. In a web printing rotary press, a printing cou 1e driven at a constant spec the form cy inder of the printing coup e having a circumference equal to the combined maximum length of, form and spacing, web supply and take-up units, means including a 90 change gear for driving them at predetermined speeds, a webadvancin unit driven I at the surface speed of the printing couple for passing the we therethrough during the printings, a second web advancing unit for 35 passing the web through the printing couple between the rintings, and a variable speed unit driven y the web supply unit for driving the second web advancing unit at the same surface'speed as or at lesser surface 9 speeds than the printing couple, according to t e required spacings between the impressions.

In testimony, that I claim the foregoing as mi invention, I have signed my name this 9t day of June, 1931.

HOWARD M. BARBER. 

